Question

A substance the forms a thin layer between the two surfaces in contact

Answer 1

Explanation:

Boundary friction It is the friction, experienced between the rubbing surfaces, when the surfaces have a very thin layer of lubricant. The thickness of this very thin layer is of the molecular dimension.

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Answer 2

The correct answer to the given question is a lubricant.

• Lubricant forms a film between two surfaces that are in contact with each other.
• It's a material that forms a film between two surfaces to help minimize friction.
• It fills the space created by wear and tear and voids on the surface by an interlocking mechanism.
• For this reason, lubricant should be applied to machines and equipment at regular intervals to ensure appropriate efficiency.
• Therefore, lubricant lowers friction between two contact surfaces by generating a thin layer.